AnalogPackrat
Well-known member
So I got my parts from Ferrous Maximus (CJ) and am ready to wind the first one. I found some trifilar 34 guage magnet wire at a local surplus joint, so that's what I'm going to try to use (I wasn't going to use the meter winding on my APIs anyway). Questions:
1) How much tension should I try to keep on the wire as I wind (or the corollary, how loose is too loose)?
2) Given that I'll have only three wires of smaller guage, how many more turns should I put on than the "real" one's 276? I know DCR will be higher, but L will also go up which wouldn't be bad. What about stray capacitance? How can I determine approximate bounds for the number of turns given that it will be used on an API mic pre?
3) I thought I saw a winding calculator somewhere around here, but I can't find it. I seem to remember it taking wire guage and maybe bobbin dimensions and giving an estimate of # turns, inductance, and DCR. Or maybe I dreamt it all up. I couldn't find it in the transformer meta or with searches. Help?
Looking forward to getting started! Thanks for any help.
A P
1) How much tension should I try to keep on the wire as I wind (or the corollary, how loose is too loose)?
2) Given that I'll have only three wires of smaller guage, how many more turns should I put on than the "real" one's 276? I know DCR will be higher, but L will also go up which wouldn't be bad. What about stray capacitance? How can I determine approximate bounds for the number of turns given that it will be used on an API mic pre?
3) I thought I saw a winding calculator somewhere around here, but I can't find it. I seem to remember it taking wire guage and maybe bobbin dimensions and giving an estimate of # turns, inductance, and DCR. Or maybe I dreamt it all up. I couldn't find it in the transformer meta or with searches. Help?
Looking forward to getting started! Thanks for any help.
A P